An ablation device for ablating epicardial tissue on a heart is disclosed. The device includes an elongated probe having at least one tissue contacting surface for contacting the epicardial tissue. The device also includes a plurality of suction ports and a plurality of ablating elements aligned along at least part of the axis of the elongated probe and coupled with a tissue contacting member. The assembly may optionally include a visualization device to determine the location and depth of transmural lesions. Also disclosed are methods of locating and placing the ablation device and forming transmural lesions on a heart for treatment of cardiac arrythmias.
